function trim(x) {
	var ch,c;
	ch=x.toString();
	c=ch.charAt(0);
	while(c==" ") { 
		ch=ch.slice(1);
		c=ch.charAt(0);
	}
	c=ch.charAt(ch.length-1);
	while(c==" ") { 
		ch=ch.slice(0,-1);
		c=ch.charAt(ch.length-1);
	}
	return ch;
}
function check_mail(email) { 
	var re = new RegExp("^[\\w\\.-]+@[\\w\\.-]+\\.[A-Za-z]{2,}");
  	return (re.test(email));
}
function pr_Inp(obj,cl,fl) {
	if((fl)?check_mail(obj.value):trim(obj.value)) {
		obj.className=cl;
		return true;
	}
	else {
		obj.className=cl+'_err';
		obj.focus();
		return false;
	}
}
function cu_Form() {
	with(document) {
		var ok=0;
		if(getElementById('cu_not')) Show_Hide('cu_not','c_num');
		if(pr_Inp(form_4371.ch_num,'cf_inp_b')) ++ok;
		if(pr_Inp(form_4371.bodymessg,'cf_inp_area')) ++ok;
		//if(pr_Inp(form_4371.question,'c_form_i')) ++ok;
		if(pr_Inp(form_4371.email,'cf_inp_r',true)) ++ok;
		if(pr_Inp(form_4371.fname,'cf_inp_l')) ++ok;
		if(ok==4) {
			form_4371.action.value='2';
			form_4371.submit();
		}
	}
}