javascript - Filter Form Parameters Before Submitting

Question

Is there a way to check the parameter if its empty or not before submitting?

<form method="GET">
    <input name="param1" value="test"/>
    <input name="param2" value=""/>
    <input type="submit" name="" id="search-submit" class="button" value="Submit">
</form>

If i have a form something like this. the param2 is empty so when I press submit, it look like this

link.com?param1=test&param2=

so is it possible to attain something like this that when a param is empty. it should not be included. like

link.com?param1=test

since the param2 is empty

Answer 1

Pure javascript method

form.onsubmit=function(){
  var arr=this.elements,i=0,l=arr.length;
  for(;i<l;i++){
    if(arr[i].value===''){
      arr[i].disabled=true;
    }
  }
}

To answer OP's further question

function checkForm(){
  var arr=this.elements,i=0,l=arr.length;
  for(;i<l;i++){
    if(arr[i].value===''){
      arr[i].disabled=true;
    }
  }
}
var arr=document.getElementsByTagName('form'),i=0,l=arr.length;
for(;i<l;i++){
  arr[i].onsubmit=checkForm;
}