File "dateITA.js"
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/**
* Return true, if the value is a valid date, also making this formal check dd/mm/yyyy.
*
* @example $.validator.methods.date("01/01/1900")
* @result true
*
* @example $.validator.methods.date("01/13/1990")
* @result false
*
* @example $.validator.methods.date("01.01.1900")
* @result false
*
* @example <input name="pippo" class="{dateITA:true}" />
* @desc Declares an optional input element whose value must be a valid date.
*
* @name $.validator.methods.dateITA
* @type Boolean
* @cat Plugins/Validate/Methods
*/
$.validator.addMethod( "dateITA", function( value, element ) {
var check = false,
re = /^\d{1,2}\/\d{1,2}\/\d{4}$/,
adata, gg, mm, aaaa, xdata;
if ( re.test( value ) ) {
adata = value.split( "/" );
gg = parseInt( adata[ 0 ], 10 );
mm = parseInt( adata[ 1 ], 10 );
aaaa = parseInt( adata[ 2 ], 10 );
xdata = new Date( Date.UTC( aaaa, mm - 1, gg, 12, 0, 0, 0 ) );
if ( ( xdata.getUTCFullYear() === aaaa ) && ( xdata.getUTCMonth() === mm - 1 ) && ( xdata.getUTCDate() === gg ) ) {
check = true;
} else {
check = false;
}
} else {
check = false;
}
return this.optional( element ) || check;
}, $.validator.messages.date );