备注字段长度控制JS

备注字段长度控制JS

		//变更原因备注字符长度控制function checkChangeLength() { var field = $("#changeReasonDesc").val();maxlimit=250; if (field.length > maxlimit){field = field.substring(0, maxlimit); $.messager.alert("操作提示","最多只能输入250个汉字！","info");$("#projectDesc").val(field);} }

<textarea id="changeReasonDesc" name="changeReasonDesc" style="width:760px;height:60px;font:12px/150% Arial,Verdana,'宋体';" placeholder="最多输入250个汉字" οnkeyup="checkchangeLength();"></textarea>

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