var isMozilla = (navigator.userAgent.toLowerCase().indexOf('gecko')!=-1) ? true : false;

var regexp = new RegExp("[\r]","gi");



function tag(selec)

{

	if (isMozilla) 

	{

	// Si on est sur Mozilla



		oField = document.forms['blog'].elements['text'];



		objectValue = oField.value;



		deb = oField.selectionStart;

		fin = oField.selectionEnd;



		objectValueDeb = objectValue.substring( 0 , oField.selectionStart );

		objectValueFin = objectValue.substring( oField.selectionEnd , oField.textLength );

		objectSelected = objectValue.substring( oField.selectionStart ,oField.selectionEnd );



	//	alert("Debut:'"+objectValueDeb+"' ("+deb+")\nFin:'"+objectValueFin+"' ("+fin+")\n\nSelectionné:'"+objectSelected+"'("+(fin-deb)+")");

			

		oField.value = objectValueDeb + "[" + selec + "]" + objectSelected + "[/" + selec + "]" + objectValueFin;

		oField.selectionStart = strlen(objectValueDeb);

		oField.selectionEnd = strlen(objectValueDeb + "[" + selec + "]" + objectSelected + "[/" + selec + "]");

		oField.focus();

		oField.setSelectionRange(

			objectValueDeb.length + selec.length + 2,

			objectValueDeb.length + selec.length + 2);

	}

	else

	{

	// Si on est sur IE

		

		oField = document.forms['blog'].elements['text'];

		var str = document.selection.createRange().text;



		if (str.length>0)

		{

		// Si on a selectionné du texte

			var sel = document.selection.createRange();

			sel.text = "[" + selec + "]" + str + "[/" + selec + "]";

			sel.collapse();

			sel.select();

		}

		else

		{

			oField.focus(oField.caretPos);

		//	alert(oField.caretPos+"\n"+oField.value.length+"\n")

			oField.focus(oField.value.length);

			oField.caretPos = document.selection.createRange().duplicate();

			

			var bidon = "%~%";

			var orig = oField.value;

			oField.caretPos.text = bidon;

			var i = oField.value.search(bidon);

			oField.value = orig.substr(0,i) + "[" + selec + "][/" + selec + "]" + orig.substr(i, oField.value.length);

			var r = 0;

			for(n = 0; n < i; n++)

			{if(regexp.test(oField.value.substr(n,2)) == true){r++;}};

			pos = i + 2 + selec.length - r;

			//placer(document.forms['news'].elements['newst'], pos);

			var r = oField.createTextRange();

			r.moveStart('character', pos);

			r.collapse();

			r.select();



		}

	}

}