function checkField()
{
	if(document.frmcontactus.name.value=="")
	{
		alert("Name is a required field");
		document.frmcontactus.name.focus();
		return false;
	}
	if(document.frmcontactus.email.value=="")
	{
		alert("E-mail is a required field");
		document.frmcontactus.email.focus();
		return false;
	}
	if(!isemail(document.frmcontactus.email.value))
   	{
		alert("Enter valid email id");
		document.frmcontactus.email.focus();
		return false;
   	}
	if(document.frmcontactus.comments.value=="")
	{
		alert("Comments is a required field");
		document.frmcontactus.comments.focus();
		return false;
	}
	document.frmcontactus.tar.value="send";
	//document.frmcontactus.submit();
}

function isemail(data)
{
var flag = false;
if (  (data.indexOf('@',0)  == -1) || (data.indexOf('\\',0)  != -1) || (data.indexOf('/',0)  != -1) ||!checkfield(data) || ( data.indexOf('.',0)  == -1 ) || ( data.indexOf('@')  == 0 ) || ( data.lastIndexOf('.') < data.lastIndexOf('@')  ) || ( data.lastIndexOf('.') == (data.length - 1)  ) ||        ( data.lastIndexOf('@')   !=   data.indexOf('@') ) || (data.indexOf(',',0)  != -1) ||  (data.indexOf(':',0)  != -1) || (data.indexOf(';',0)  != -1)  )return flag
else         {
             var temp = rmspaces(data);
             if (temp.indexOf(' ',0) != -1) flag = true;
             var d3 = temp.lastIndexOf('.') + 4;
             var d4 = temp.substring(0,d3);
             var e2 = temp.length  -  temp.lastIndexOf('.')  - 1 ;
             var i1 = temp.indexOf('@') ;
          if (  (temp.charAt(i1+1) == '.') || ( e2 > 3 )  ||  ( e2 < 2 )    ) flag = true;
          return !flag;
                   };
};

function rmspaces(x) 
{
var leftx = 0;
var rightx = x.length -1;
while ( x.charAt(leftx) == ' ') leftx++;
while ( x.charAt(rightx) == ' ') --rightx;
var q = x.substr(leftx,rightx-leftx + 1); 
if ( (leftx == x.length) && (rightx == -1) ) q ='';
return(q)
};

function isnumeric(data)
 {
 var flag = ( (rmspaces(data)).length > 0);
 var isdot = 0;
  if (flag)
  {
       	for (i=0;i<data.length && flag;i++)
 		if ( data.charAt(i) > '9' || data.charAt(i) < '0')
 		   {
 		     if (data.charAt(i) != '.' || isdot > 0)
 		        {
 		          flag = false;
			}
		       else
		        {
			   isdot = 1;
			}
 		   };
  }
 return flag
 }

function checkfield(data)
{
if (rmspaces(data) == "") return false
else return true;
};