var temp = document.getElementById("inputdateid").value;
document.getElementById("inputdateid").value = '';
var inputdateCombo = Ext.getCmp("inputdateid");
//下面两行用来设置默认值
if(temp == '请选择日期...')
inputdateCombo.emptyText = '请选择日期...';
else
inputdateCombo.emptyText = '请重新选择日期...';
inputdateCombo.applyEmptyText();
inputdateCombo.setRawValue(inputdateCombo.emptyText);
inputdateCombo.show();
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