SIMPLE PYQT EXECUTE JS

# -*- coding: utf-8 -*-
from basebrowser import *

class SimpleJavaScript(BaseBrowser):
    def __init__(self,  parent = None):
        super(SimpleJavaScript, self).__init__(parent)
        self.jsButton = QPushButton("ExecuteJS")
        self.connect(self.jsButton, SIGNAL("clicked()"),  self.jsScript)
        self.jsStringEdit = QLineEdit()
        self.jsStringEdit.setSizePolicy(QSizePolicy.Expanding, self.jsStringEdit.sizePolicy().verticalPolicy())
        self.jsStringEdit.setText("document.getElementById(\"tabs\").rows(0).cells.length")
        self.connect(self.jsStringEdit, SIGNAL("returnPressed()"), self.jsScript)
        self.jsReturnText = QTextEdit()
        self.layout.addWidget(self.jsStringEdit, 2, 0,  1,  1)
        self.layout.addWidget(self.jsButton, 2, 1,  1,  1)
        self.layout.addWidget(self.jsReturnText, 3, 0,  1,  2)

    def jsScript(self):
        jsString = self.jsStringEdit.text()
        jsReturn = self.webView.page().currentFrame().evaluateJavaScript(jsString)
        self.jsReturnText.setPlainText(jsReturn.toString())

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    ui = SimpleJavaScript()
    ui.show()
    sys.exit(app.exec_())