form email validation does not work

Hi
I use the following form validation and it works all fine, except my email input does not get validated.

Input type = email
field name = emailto

this is the code:

function formCheck(formobj){
	// Enter name of mandatory fields
	var fieldRequired = Array("emailto","from", "emailfrom","zigi");
	// Enter field description to appear in the dialog box
	var fieldDescription = Array("Friends E-mail","Friends Name", "Your E-mail","Your Name");
	// dialog message
	var alertMsg = "These fields cannot be left blank:\n";

	var l_Msg = alertMsg.length;

	for (var i = 0; i < fieldRequired.length; i++){
		var obj = formobj.elements[fieldRequired[i]];
		if (obj){
			switch(obj.type){
			case "select-one":
				if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == ""){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "select-multiple":
				if (obj.selectedIndex == -1){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "text":
			case "textarea":
				if (obj.value == "" || obj.value == null){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "email":
				if (obj.value == "" || obj.value == null){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				var strValue = emailto.obj.value; 
				var strFilter = /^([0-9a-z]([-.\w]*[0-9a-z])*@(([0-9a-z])+([-\w]*[0-9a-z])*\.)+[a-z]{2,6})$/i;
				if (!strFilter.test(strValue))
					alertMsg = "wrong or incomplete email" + fieldDescription[i] + "\n";
				}
				break;
			default:
			}
			if (obj.type == undefined){
				var blnchecked = false;
				for (var j = 0; j < obj.length; j++){
					if (obj[j].checked){
						blnchecked = true;
					}
				}
				if (!blnchecked){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
			}
        }
   }
	if (alertMsg.length == l_Msg){
		return true;
	}else{
		alert(alertMsg);
		return false;
	}
}

PHP:

What am I missing in the email validation, please?

Thank a lot

 

This is a javascript question not a PHP question

 

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OK thanks
You may delete this post since I posted it new in the Javascript forum