// EPLUS Knowledge Solutions Contact form Validation
// JavaScript Document
function validateForm()
{
	if(isEmpty(document.getElementById('sender_name'),"Please enter your name")==false)
		{
			document.getElementById('sender_name').select();
			document.getElementById('sender_name').focus();
			return false;
		}	
	if(echeck(document.getElementById('sender_email').value)==false)	
		{
			document.getElementById('sender_email').select();
			document.getElementById('sender_email').focus();
			return false;
		}	
	if(IsNumeric(document.getElementById('phone').value)==false)	
		{
			document.getElementById('phone').select();
			document.getElementById('phone').focus();
			return false;
		}
	if(document.phpformmailer.subject.selectedIndex==0)
  		{		
			alert("Please select the Category");
			document.phpformmailer.subject.focus();
			return false;
 		}
	if(isEmpty(document.getElementById('themessage'),"Please enter your message")==false)
		{
		document.getElementById('themessage').select();
		document.getElementById('themessage').focus();
		return false;
		}
}

//Check empty validation						
function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return false;
	}
	else
	{
		 return true;
	}
}

//Email Validation
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str=='')
			{
			alert("Please enter your E-mail ID")
			return false;
			}
		if (str.indexOf(at)==-1)
		{
		   alert("Please enter valid E-mail ID")
		   return false
		}

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

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

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

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

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Please enter valid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Please enter valid E-mail ID")
		    return false
		 }
	}
	
// Numeric Validation
function IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789- ";
   var strChar;
   var blnResult = true;

   if (strString.length == 0)
   		{ 
   			alert("Please enter your phone number")
   			return false;
		}
   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
		 alert("Please enter valid phone number")
         blnResult = false;
         }
      }
   return blnResult;
}