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.
  
}

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 strYear=dtStr.substring(0,pos1);
    var strMonth=dtStr.substring(pos1+1,pos2);
    var strDay=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 : YYYY-MM-DD");
        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 (strMonth.length<1 || month<1 || month>12)
    {
        alert("Please enter a valid month");
        return false;
    }
   
    if (strYear.length != 4 || year==0 || year<minYear || year>maxYear)
    {
        alert("Please enter a valid 4 digit year");
        return false;
    }
    if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false)
    {
        alert("Please enter a valid date");
        return false;
    }

}
function  datefun(dt,edt,msg)
{
	
			var ddt=dt.split("-");
			
			for(var i=0,j=ddt.length;i<j;i++) 
			{
				var da=ddt[2];
				var mo=ddt[1];
				var ye=ddt[0];
			}
			var eedt=edt.split("-");
			for(var k=0,l=eedt.length;k<l;k++) 
			{
				var daa=eedt[2];
				var moa=eedt[1];
				var yea=eedt[0];
			}

			var dObj1 = new Date(ye,mo,da,0,0,0,0);
			var dObj2 = new Date(yea,moa,daa,0,0,0,0);

			if(dObj1.valueOf() >  dObj2.valueOf())
			{
				alert(msg);
				//dd1.focus();
				return 0;
			}
	
}

function validate(supid)
		{
		curid=document.searchform.section.value;
		//alert(document.searchform.searchword.value.length);return false;
		if(document.searchform.search_searchword.value=="")
		{
		       alert("Please enter the search key word");
				document.searchform.search_searchword.focus();
				return false;
		}
		if(document.searchform.search_searchword.value!="")
		{
			if(document.searchform.search_searchword.value.length < 3) 
			{
				alert("search key word should not be less than 3 charecters ");
				document.searchform.search_searchword.focus();
				return false;
			}
			document.searchform.searchword.value=document.searchform.search_searchword.value;
		}
		if(document.searchform.fromdate.value!=""){
			var fdt=document.searchform.fromdate.value;
			if(isDate(fdt)== false){
			document.searchform.fromdate.focus();
			return false;
			}
		}
		if(document.searchform.todate.value!=""){
		    var fdt=document.searchform.fromdate.value;
			var tdt=document.searchform.todate.value;
			if(isDate(tdt)== false){
			document.searchform.todate.focus();
			return false;
			}
			if(datefun(fdt,tdt,'To date must be bigger than from date')==0){
			document.searchform.todate.focus();
			return false;
			}
		}
			/*if(document.searchform.section.value!=""){
			 if(document.searchform.category.value==0){
			 alert("Please Select Any One Option");
			 return false;
			 }
			}*/
			else
			{
				return true;
			}
			
		}