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Let’s summarise here how to disable, enable, check, assign values and get selected values from your html document.

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<select name="client.idClient" id="idClient">
	<option value="1">CLIENT 1</option>
	<option value="2">CLIENT 2</option>
	<option value="3">CLIENT 3</option>
</select>

You can disable an element by setting the disabled attribute to disabled:

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jQuery("#idClient").attr("disabled","disabled");

And enable the element by removing the disabled attribute:

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jQuery("#idClient").removeAttr("disabled");

If the element is an input:

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<input type="checkbox" id="yes"/>

then you have to set the checked attribute to checked:

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jQuery("#yes").attr("checked","checked");
jQuery("#yes").removeAttr("checked");

If you want to set a value for an element in your document:

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jQuery("#idClient").val('1');

will set the selected option in the dropdown to the value 1.

To get the selected value:

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jQuery("#idClient").val();

and the selected text:

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jQuery("#idClient option:selected").text();

Very useful link: jQuery – FAQ

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