var W3CDOM = (document.getElementsByTagName && document.createElement);

function checkvaild(){
        var res = validate();
		if(res == true){
			 document.forms[0].submit();
    	}
}

function validate() {
    
    //global js var | used to determine if form data is valid and should be submitted
    validForm = true;
    
    //global js var | points to the first invalid form input element
    firstError = null;
    
    //global js var | only used if W3C DOM is not supported
    errorstring = "";
    
    var inputElementObj = document.forms[0].elements;
    
    var requiredInputElementsAr=new Array("nameBusiness","address","city","state","zip","phoneNumber");
    
    //for each form element
    for (var i=0;i<inputElementObj.length;i++) {
        
        //alert(requiredInputElementsAr.toString()+":"+inputElementObj[i].id);
	
	//if input element is required and contains data
	if ((requiredInputElementsAr.toString().indexOf((inputElementObj[i].id))!=-1) && (!inputElementObj[i].value))
            writeError(inputElementObj[i],"This field is required");
    }
    
    /* validate state */
    
    //if state is invalid | state does not contain 2 ascii word characters OR state contains 1 or more digits
    if (inputElementObj["state"].value.search(/^\w{2}$/)==-1 || inputElementObj["state"].value.search(/\d+/)!=-1) {
	
	writeError(inputElementObj["state"],"Incorrent state format");
    }
    
    /* validate zipcode */
    
    //if zip code does not contains 5 digits and does not contain a hyphen
    if (inputElementObj["zip"].value.search(/\d{5}/)==-1 && inputElementObj["zip"].value.indexOf("-")==-1) {
	
	writeError(inputElementObj["zip"],"Incorrent Zip Code format");
    }
    else if (inputElementObj["zip"].value.search(/\d{5}-\d{4}/)==-1 && inputElementObj["zip"].value.indexOf("-")!=-1) {
	
	writeError(inputElementObj["zip"],"Incorrent Zip Code format");
    }
    
    /* validate phone number */
    
    //if phone number is invalid
    if (inputElementObj["phoneNumber"].value.search(/\(?\d{3}\)?([-\/\.])\d{3}\1\d{4}/)==-1) {
	
	writeError(inputElementObj["phoneNumber"],"Incorrent phone number format");
    }
    
    //if DOM is not supported, alert error message
    if (!W3CDOM)
        alert(errorstring);
    
    if (firstError)
        firstError.focus();
    
    //return validForm;\
    
    return validForm;
}

function writeError(obj,message) {
    
    validForm = false;
    
    if (obj.hasError) return;
    
    if (W3CDOM) {
        
        obj.className+=" error";
	
        obj.onchange=removeError;
	
        //get span element object
        var spanObj=document.getElementById(obj.name+"_error");
	
        spanObj.style.display="inline";
        spanObj.innerHTML="";
        spanObj.innerHTML=message;
        
        /*
        sp.className = "error";
	sp.appendChild(document.createTextNode(message));
	obj.parentNode.appendChild(sp);
        */
	
        obj.hasError=spanObj;
        
    }
    else {
        errorstring+=obj.name + ": " + message + "\n";
	obj.hasError=true;
    }
    
    if (!firstError)
        firstError=obj;
    
    return;
}

function removeError()
{
    this.className = this.className.substring(0,this.className.lastIndexOf(" "));
    
    var spanObj=document.getElementById(this.hasError.id);
    spanObj.style.display="none";

    //this.parentNode.removeChild(this.hasError);
    
    this.hasError = null;
    this.onchange = null;
    
    return;
}