唯其如此输入整数

只能输入整数
function setOnlyNum() {
$(this).css("ime-mode", "disabled");
$(this).attr("t_value", "");
$(this).attr("o_value", "");
$(this).bind("dragenter", function() {
return false;
})
$(this).keypress(function() {
if (!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))
this.value = this.t_value;
else
this.t_value = this.value;
if (this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/))
this.o_value = this.value
}).keyup(function() {
if (!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))
this.value = this.t_value;
else
this.t_value = this.value;
if (this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/))
this.o_value = this.value
}).blur(function() {
if (!this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?|\.\d*?)?$/))
this.value = this.o_value;
else {
if (this.value.match(/^\.\d+$/))
this.value = 0 + this.value;
if (this.value.match(/^\.$/))
this.value = 0;
this.o_value = this.value
}
if (this.value.length == 0)
this.value = "0";
})
//this.text.selected;
}