function loginvalidate(aform){
	if(strTrim(aform.login.value)=="" || aform.login.value==null){
		alert('Please enter login name');
		aform.login.value="";
		aform.login.focus();
		return false;
	}
	else if(strTrim(aform.login.value)=="null"){
		alert('Please enter a valid login name');
		aform.login.value="";
		aform.login.focus();
		return false;
	}
	else if(strTrim(aform.password.value)=="" || aform.password.value==null){
		alert('Please enter password');
		aform.password.value="";
		aform.password.focus();
		return false;
	}
	else if(strTrim(aform.password.value)=="null"){
		alert('Please enter a valid password');
		aform.password.value="";
		aform.password.focus();
		return false;
	}
	else{
		return true;
	}
}

function strTrim(sParseString){
	var sResultString = "";
	var nCount=0;
	for(nCount=0;nCount<sParseString.length;nCount++){
		if(sParseString.charAt(nCount) != "" && sParseString.charAt(nCount) != " "){
			sResultString = sResultString + sParseString.charAt(nCount);
		}
	}
	return sResultString;
}