/**
 * DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */

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 email.")
		   return false
		}

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

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

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

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

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

 		 return true					
	}

function ValidateEmail(id){
	var emailID=document.getElementById(id);
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please enter an email.");
		emailID.focus();
		return false;
	}
	if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	}
	return true;
 }
 
function CheckEmailFormAndValidate(fromemail,fromname,toemail,toname)
{
	var femail = document.getElementById(fromemail);
	var fname = document.getElementById(fromname);
	var temail = document.getElementById(toemail);
	var tname = document.getElementById(toname);
	
	if((fname.value==null)||(fname.value==""))
	{
		alert("Please enter a name.");
		fname.focus();
		return false;
	}
	
	if((tname.value==null)||(tname.value==""))
	{
		alert("Please enter a name.");
		tname.focus();
		return false;
	}
	
	if(!ValidateEmail(fromemail)||!ValidateEmail(toemail))
	{
		return false;
	}
	
	return true;
}

function CheckDefaultKeyword(keyword)
{
	if(keyword == 'Search by Keyword')
	{
		return false;
	}
	else
	{
		return true;
	}
}

function ValidateNumber(id)
{
   var strValidChars = "0123456789.";
   var strChar;
   var obj = document.getElementById(id);
   var strString = obj.value;  
       for (i = 0; i < strString.length; i++)
       {
          strChar = strString.charAt(i);
          if (strValidChars.indexOf(strChar) >= 0){
             obj.value = strString;
          }else{
             obj.value = strString.replace(strString.charAt(i),'');
          }
       }

}