/* checking value is number or not*/
function isNumber(frmName,objName){

	strNum="0123456789";
	numLen=document.forms[frmName].elements[objName].value.length;
	numValue=document.forms[frmName].elements[objName].value;		
	for(i=0;i<numLen;i++){//start for loop
		
		numSrchValue=numValue.charAt(i);
		if(strNum.indexOf(numSrchValue)==-1){
			return false;
		}
	}//end of for loop
	
	return true;

}//end of function

/*function for checking valid digits*/
function validDigits(frmName,objName){
	var digits="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@_.-";
	var frmElement=document.forms[frmName].elements[objName];
	var temp;
	for(var i=0;i<frmElement.value.length;i++){
		temp=frmElement.value.substring(i,i+1);
		if(digits.indexOf(temp)==-1){
			return (false);
		}
	}
	return (true);
}

/*function for checking blank fields*/
function IsBlank(frmName,objName){

	var frmElement=document.forms[frmName].elements[objName];
	var temp;
	var countSpace=0;
	for(var i=0;i<frmElement.value.length;i++){
		temp=frmElement.value.substring(i,i+1);
		if(temp.indexOf(" ")!=-1){
			countSpace++;
		}
	}
	if (countSpace==frmElement.value.length)
		return (false);
	
		return (true);
}

/*function for checking Email address*/
function IsEmailValid(frmName,objName){
	
	if (validDigits(frmName,objName)==false){
		return (false);
	}
	var EmailOk  = true
	var Temp     = document.forms[frmName].elements[objName]
	var AtSym    = Temp.value.indexOf('@')
	var Period   = Temp.value.lastIndexOf('.')
	var Space    = Temp.value.indexOf(' ')
	var Dot      = Temp.value.indexOf('.')
	var Length   = Temp.value.length - 1   // Array is from 0 to length-1

	if ((AtSym < 1) ||                     // '@' cannot be in first position
	    (Period <= AtSym+1) ||             // Must be atleast one valid char btwn '@' and '.'
	    (Period == Length ) ||             // Must be atleast one valid char after '.'
	    (Space  != -1)      ||              // No empty spaces permitted
	    (Dot ==0 )          ||            // No Dot on first position permitted
	    (Dot+1 ==AtSym ))                      // No Dot on first position permitted
	   {  
	      EmailOk = false
	   }
	return EmailOk
}