Man Filling out Form

Labels Inside Form Text Inputs With Javascript

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1. Default Value

Some Facts About Index Binary Options <form name="TestForm" id="TestForm" action="" method="Post"> <input name="name" id="name" type="text" value="Your Name" /> <input name="record" id="record" type="submit" value="Record Name" /> </form>

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2. Clear Out The Field On Focus

Binary Options Trading Signals Live Review Leads <form name="TestForm" id="TestForm" action="" method="Post"> <input name="name" id="name" type="text" value="Your Name" onfocus="if (this.value == this.defaultValue) {this.value=''}" /> <input name="record" id="record" type="submit" value="Record Name" /> </form>

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3. Peekaboo

Binary Options 20 Deposit Review 2016 <form name="TestForm" id="TestForm" action="" method="Post"> <input name="name" id="name" type="text" value="Your Name" onblur="if(this.value == '') { this.value=this.defaultValue}" onfocus="if (this.value == this.defaultValue) {this.value=''}" /> <input name="record" id="record" type="submit" value="Record Name" /> </form>

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4. Quick Validation – Clean the Input

Stock Market Analysis Software Canada <script type="text/javascript"> function scrub_input ( ) { if ( document.TestForm.name.value == "Your Name" ){ document.TestForm.name.value = "" } } </script>

The Best Earnings With Forex Strategy 2016 <form name="TestForm" id="TestForm" action="" method="Post" onsubmit="scrub_input();"> <input name="name" id="name" type="text" value="Your Name" onblur="if(this.value == '') { this.value=this.defaultValue}" onfocus="if (this.value == this.defaultValue) {this.value=''}" /> <input name="record" id="record" type="submit" value="Record Name" /> </form>

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The first portion defines the javascript function that will do the cleaning. The function itself, scrub_input(), is contained within script tags, and the whole thing should be placed within the page head. When run, the function will check the value of the name input of the TestForm form within the document, which is identified as such by document.TestForm.name.value. If it is the default value of “Your Name”, it will redefine it to be an empty string before submitting. To call upon this function at the appropriate time, an onsubmit portion was added to the first line of the form.

5. Adding A Bit Of Elegance – The Final Form

<script type="text/javascript">
function clean_form(id, blur=false){
	if (blur != true){
		if ( document.getElementById(id).value == document.getElementById(id).defaultValue ){
			document.getElementById(id).value = "";
		}
	}
	else if (document.getElementById(id).value == ""){
			document.getElementById(id).value = document.getElementById(id).defaultValue;
	}
}

function scrub_input ( ) {
	x = document.getElementsByTagName('input');
	for(i=0; i<x.length; i++){
		if (x[i].type="text" && x[i].value == x[i].defaultValue){
			x[i].value = "";
		}
	}
}
</script>
<form name="TestForm" id="TestForm" action="" method="Post" onsubmit="scrub_input();">
<input name="name" id="name" type="text" value="Your Name" onblur="clean_form(this.id, true)" onfocus="clean_form(this.id, false)" />
<input name="record" id="record" type="submit" value="Record Name" />
</form>

Up to this point, everything has been explicitly hardcoded. That was intentional, for purposes of conceptual clarity. In practice, once you understand the underlying process, it’s much better to use more general functions to take care of business.

The function scrub_inputs has been given an overhaul. The javascript function getElementByTagName() is used to find all of the input elements that have been submitted. It then iterates through each element. Since we’re only concerned here with text inputs, it checks for that first, followed by a check of its current value against its default value. If it finds a text input with a default value, it wipes the value to an empty string.

A new function has been defined to handle the disappear/reappear behavior, called clear_form. It takes two inputs, the first of which is the input id, with the second being a boolean flag of which behavior we want. A true flag will initiate the onBlur behavior, while false will do the onFocus behavior. In either case, it grabs the input field using getElementById() and uses the same underlying process as before, comparing the current value to the default and either wiping or redefining the current.