function validateform()
{
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;	
	if(document.getElementById("contact_name").value == "")
	{
		alert("Please enter name");
		document.getElementById("contact_name").focus();
		return false;
	}
	else if(document.getElementById("email").value == "")
	{
		alert("Please enter email");
		document.getElementById("email").focus();
		return false;
	}
	else if(reg.test(document.getElementById("email").value) == false)
	{
		alert("Please enter valid email");
		document.getElementById("email").focus();
		return false;
	}
	else if(document.getElementById("service").value == "")
	{
		alert("Please select service");
		document.getElementById("service").focus();
		return false;
	}
	else
	{
		if(document.getElementById("telephone").value != "")
		{
			if(!isInteger(document.getElementById("telephone").value))
			{
				alert("Please enter valid telephone number");
				document.getElementById("telephone").focus();
				return false;
			}
			else
			{
				return true;	
			}
		}
		else
		{
			return true;	
		}
	}
}

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.
    return true;
}

function validate_en_form()
{
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;	
	if(document.getElementById("en_contact_name").value == "")
	{
		alert("Please enter name");
		document.getElementById("en_contact_name").focus();
		return false;
	}
	else if(document.getElementById("en_email").value == "")
	{
		alert("Please enter email");
		document.getElementById("en_email").focus();
		return false;
	}
	else if(reg.test(document.getElementById("en_email").value) == false)
	{
		alert("Please enter valid email");
		document.getElementById("en_email").focus();
		return false;
	}
	else
	{
		if(document.getElementById("en_telephone").value != "")
		{
			if(!isInteger(document.getElementById("en_telephone").value))
			{
				alert("Please enter valid telephone number");
				document.getElementById("en_telephone").focus();
				return false;
			}
			else
			{
				return true;	
			}
		}
		else
		{
			return true;	
		}
	}
}