//*********variables**********************************************
var dtCh= "/";
var minYear=1900;
var maxYear=2100;
//***********************************************************************
function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}
//***********************************************************************
function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}
//***********************************************************************
function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
//***********************************************************************
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}
//***********************************************************************
function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}
//*************************************************************************************************
function itemsSelected(){
    var chkd=document.forms[0].chkleft
    
    for(i=0;i<chkd.length;i++){
               
               if(chkd[i].checked){
                         return true
               }
    
    }
   return false
}


//*************************************************************************************
function ValidateForm(){
var md=document.apptt.combo_0;
var pn=document.apptt.PatientName;
var dt=document.apptt.PrefDate;
var ph=document.apptt.Phone;
var mno=document.apptt.Mobile;
var fx=document.apptt.Fax;
var emailID=document.apptt.Email;
     
	 if(md.selectedIndex==0){
	 md.focus();
	 return false;
	 }

     if((pn.value=="")||(pn.value==null)){
        pn.focus();
        return false;     
     }

     if ((emailID.value==null)||(emailID.value=="")){
		
	 } else {

	 if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	 }
	 }
  
    if((dt.value=="")||(dt.value==null)){
    }
	else {
          if (isDate(dt.value)==false){
           dt.value="";
		   dt.focus();
           return false;
		}
     }
	 
     if((ph.value=="")||(ph.value==null)){
        ph.focus();
        return false;    
     } else {
	   if(isInteger(ph.value)==false){
	     ph.value="";
		 ph.focus();
		 return false;
	   }
	 }
	 
	 if((mno.value=="")||(mno.value==null)){
        mno.focus();
        return false;    
     } else {
	   if(isInteger(mno.value)==false){
	     mno.value="";
		 mno.focus();
		 return false;
	   }
	 }
	 
	  if((fx.value!="")||(fx.value!=null)){
        if(isInteger(fx.value)==false){
		  fx.value="";
		  fx.focus();
          return false;       
		}
     }
    
	                  return true;
   }
//********************************************************************************
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}

//**************************************************************


				   
				   
function fillSel(selObj)
{
  var destList = "Physicians";
  var i = j = 0;
  var newItem;
  var src;
  var srcName = "";

   for (i = 0; i < selObj.length; i++)
      if (selObj.options[i].selected)
         srcName = selObj.options[i].title;

   src = eval(srcName);

  var dest = eval("document.apptt." + destList);    

  with (dest)   
  {
     options.length = 0;
     for (i = 0; i < src.length; i++)
     {
       newItem = options.length;
       options[newItem] = new Option(src[i]);
       options[newItem].value = src[i+1];
     }
     options[0].selected = true;
  }
  if (!isOk) history.go(0);
}