Check page for any visible input forms

How to check if the DOM has any visible input forms, e.g. input field, select field, multitext field, etc. there is atleast one of those, I will need to run a开发者_开发知识库 certain code. If all are hidden not atleast 1 is shown I will not show run the code.

if(ThereIsVisibleInputFields) {
    IWillRunThisCode();   
}

EDIT:

How about using this.

if($(":input:visible").length) {
    IWillRunThisCode();
}

Does :input selector selects all form elements?

The :visible selector is what you most likely need. You can use it as such-

if ($('input:visible, textarea:visible, select:visible').length > 0) {
    IWillRunThisCode();
}

You can check the jQuery api page for more info - :visible Selector

Edit: As pointed out by OP, the :input selector works equally well. Even better, it also selects buttons, which my original code didn't. So the selector should really be

if ($(':input:visible').length) {
    IWillRunThisCode();
}

function ThereIsVisibleInputFields(){
   var arr = new Array();
   arr = document.getElementsByTagName( "input" );
   for(var i=0; i < arr.length; i++)
            {
                var tagName = document.getElementsByTagName( "*" ).item(i).nodeName;
                var tagObj = document.getElementsByTagName( "*" ).item(i);
                if(tagObj.style.visibility=="visible"||tagObj.style.display!="none")             
                     return true;
            }
   return false;
}

Similarly we can chek for other tags also(select,textarea etc)